Revue bibliographique sur la caractérisation mécanique des matériaux utilisant la déformation représentative en indentation sphérique Literature review on mechanical characterization of materials using a representative strain in spherical indentation

Charbel Moussa (1) , Olivier Bartier (1) , Gerard Mauvoisin (1) , Guillaume Delattre (2) , Xavier Hernot (1)

1 LGCGM - Laboratoire de Génie Civil et Génie Mécanique
2 Faurecia Automotive Seating

The instrumented indentation provides access to several mechanical properties of materials, leading in particular to the knowledge of their hardening law. In front of the lack of a standard procedure, many techniques have been proposed in recent decades. The present work is a literature review on the methods of mechanical characterization based on the instrumented indentation, and using a representative strain. There are two families of methods. The first, based on the Meyer hardness, includes methods of conducting hardness tests with different loads and determine, from the hardness and measuring the radius of the corresponding imprint, a representative deformation and the corresponding stress leading to the construction of the work hardenning curve "point by point" of the tested material. The second includes the methods giving the 2 plastic parameters of the Hollomon law that minimize the difference between the experimental indentation F(h) curve, and a model based on a representative deformation, linking the measured quantities (F, h) and the parameters of the Hollomon law. Each family of methods has advantages and disadvantages that should be known for choosing the most suitable method to the studied case and thus makes best use of instrumented indentation testing.

Mots clés: spherical indentation; mechanical characterization; representative strain

Domaines: Sciences de l'ingénieur [physics]

Charbel Moussa, Olivier Bartier, Gerard Mauvoisin, Guillaume Delattre, Xavier Hernot. Revue bibliographique sur la caractérisation mécanique des matériaux utilisant la déformation représentative en indentation sphérique Literature review on mechanical characterization of materials using a representative strain in spherical indentation. Matériaux & Techniques, 2013, 101 (302), pp.1-14. ⟨hal-00996606⟩